This LogicWorld mod gives you 5 new crucial logic components:
NAND GateOR GateNOR GateXOR GateXNOR Gate
The new XOR Gate is a smaller version of the original XOR to minimize space.
To install mods, just drag and drop the MoreGates folder inside your /path/to/LogicWorld/GameData/ folder and you are ready to enjoy the mod!
You can see my other creations here.